Message-ID: <49DCC584.3060609@jpl.nasa.gov> Date: Wed, 08 Apr 2009 08:40:52 -0700 From: Robert Khachikyan User-Agent: Thunderbird 2.0.0.21 (Windows/20090302) To: jim.ray@noaa.gov CC: Marc Weiss , IGSStation , Victor Zhang , Ken.Senior@nrl.navy.mil Subject: [IGSSTATION-2977]: Re: [IGSSTATION-2975]: Re: NIST primary receiver References: <200904071908.n37J897g001297@franklin.boulder.nist.gov> <49DBA96F.5010209@noaa.gov> In-Reply-To: <49DBA96F.5010209@noaa.gov> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-igsstation Precedence: bulk ****************************************************************************** IGS Station Mail 08 Apr 08:42:45 PDT 2009 Message Number 2977 ****************************************************************************** Author: Robert Khachikyan Jim, We have noted the latency issue. The bug has been identified to be outside of the IGS Central Bureau. Proper steps have been taken to remedy the problem as soon as possible. Best Regards, --Robert Khachikyan IGS Central Bureau Jim.Ray wrote: > ****************************************************************************** > > IGS Station Mail 07 Apr 12:29:08 PDT 2009 Message Number > 2975 > ****************************************************************************** > > > Author: Jim Ray > > To amplify on Marc's message, the level of cycle slips for > NISU is more than an order of magnitude greater than for > NIST -- see plots at: > > http://igscb.jpl.nasa.gov/network/site/nisu.html > http://igscb.jpl.nasa.gov/network/site/nist.html > > In fact, the NISU cycle slips are high enough to suggest > some problem with the hardware there (or snow covering the > antenna). Both MP1 and MP2 are on the high side too. > > I would suggest to plan to decommission this site in the > near future. > > On the down side, though, the data delivery latencies for > both stations are excessive (for the past ~40 d) and really > should be reduced (assuming the IGS CB plots are correct). > > Also, both are registered with M type ("marker") DOMES > numbers whereas they both use the antenna ARPs as physical > reference points. It is too late to correct this now, but > please request S type ("system") DOMES numbers for such > points in the future. > > > > Marc Weiss wrote: >> ****************************************************************************** >> >> IGS Station Mail 07 Apr 12:08:43 PDT 2009 Message >> Number 2974 >> ****************************************************************************** >> >> >> Author: Marc Weiss >> Subject: NIST primary receiver >> >> Dear Colleagues, >> >> The station named NIST is a newer station in the IGS that is intended >> to be the primary station of NIST in Boulder. This uses newer (and >> apparently better) equipment than our older station NISU. Several >> analysis centers are still using the data from NISU instead of those >> from NIST. Please consider using the data from NIST. >> >> Best Regards, >> Marc Weiss >> >> >> >> ____________________________________________________________________ >> Marc A. Weiss, Ph.D. Phone: >> 303/497-3261 >> NIST Time and Frequency Division FAX: 303/497-6461 >> MS 847.5, 325 Broadway >> Boulder, CO 80305-3328 >> ____________________________________________________________________